Brock Biology of Microorganisms (14th Edition)
Brock Biology of Microorganisms (14th Edition)
14th Edition
ISBN: 9780321897398
Author: Michael T. Madigan, John M. Martinko, Kelly S. Bender, Daniel H. Buckley, David A. Stahl, Thomas Brock
Publisher: PEARSON
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Chapter 31, Problem 1RQ
Summary Introduction

Quality of water is a very important factor which helps to ensure public health. Contaminated water is the source of various types of waterborne diseases. Various types of waterborne illness occur due to untreated or poorly treated water which is used for drinking or food preparation purposes.

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The two major classes of water include potable water and recreational water. Water which is suitable for the consumption of human beings is referred to as potable water. Filtration and chlorination process are the two important processes which are carried out in potable water to make it safe for consumption. Recreational water includes aquatic freshwater systems such as a stream, lakes, ponds, as well as public wading and swimming pools. This recreational source of water acts as a major cause of waterborne illness and causes more disease outbreaks as compared to drinking water.

Surface water can be made safe for drinking purposes through the process of filtration and chlorination. Both these process make the surface of recreational water just like of potable water.

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Coliforms are commonly used as an indicator of drinking water quality. As we discussed, in March and April of 1993 there was a major outbreak of gastrointestinal illness in Milwaukee, Wisconsin caused by contamination in the public drinking water supply.  As summarized by MacKenzie et al.1, “throughout the period from February to April 1993, samples of treated water from both (water treatment) plants were negative for coliforms and were within the limits set by the Wisconsin Department of Natural Resources for water quality.”  Why, in this case, did coliforms remain at acceptable levels despite water contamination that resulted in over 400,000 cases of gastrointestinal illness?
Some cities have strict controls in place to address stormwater pollution and are working to separate storm sewers from sewer systems that carry human waste. Do you think it is fair for a city to pass such ordinances to protect water quality and ensure an adequate water supply?
why is it important to have an access of clean and safe drinking water?

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